jquery prevent form submit if field empty code example

Example 1: jquery check if input is empty on submit

var empty = true;
$('input[type="text"]').each(function() {
   if ($(this).val() != "") {
      empty = false;
      return false;
   }
});

Example 2: jquery don't empty specific form field after submit

form.find('textarea,input,select').not('input[name="INPUT_NAME_1"],input[name="INPUT_NAME_2"]').val('');